Coding - Approx_SweepApproximation call on null pointer

I compiled OCCT with the -fsanitize=undefined flag and got the following errors:

src/Approx/Approx_SweepApproximation.cxx:179:31: runtime error: member call on null pointer of type 'struct TColgp_HArray1OfVec2d'
src/Approx/Approx_SweepApproximation.cxx:179:31: runtime error: member access within null pointer of type 'struct TColgp_HArray1OfVec2d'

This is a problem when Num2DSS==0 the arrays:

 if (Num2DSS>0) {
   myPoles2d = new (TColgp_HArray1OfPnt2d)(1, Num2DSS);
   myDPoles2d = new (TColgp_HArray1OfVec2d)(1, Num2DSS);
   myD2Poles2d = new (TColgp_HArray1OfVec2d)(1, Num2DSS);
   COnSurfErr = new (TColStd_HArray1OfReal)(1, Num2DSS);
 }

which are then used on line 179. This fix avoids the null pointer:

 myPoles2d = new (TColgp_HArray1OfPnt2d)(1, std::max(Num2DSS,1));
 myDPoles2d = new (TColgp_HArray1OfVec2d)(1, std::max(Num2DSS,1));
 myD2Poles2d = new (TColgp_HArray1OfVec2d)(1, std::max(Num2DSS,1));
 COnSurfErr = new (TColStd_HArray1OfReal)(1, std::max(Num2DSS,1));

but may not be the right solution.